title: Normalized power variance change between pre-ictal and ictal phase of an epilepsy patient using NAT analysis: a case study.
abstract: Variance of state variables shifts due to phase-instability and may serve as an early-warning signal of phase transition of complex systems such as an epileptic seizure of brain cortical activity. Neuronal Activity Topology (NAT) analysis calculates a normalized-power-variance (NPV) of electroencephalogram (EEG) data in each frequency band to obtain relative values comparable among different power states.
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Aoki
authors.forename: Ryouhei
authors.initials: R
authors.lastname: Ishii
authors.forename: Masao
authors.initials: M
authors.lastname: Iwase
authors.forename: Shunichiro
authors.initials: S
authors.lastname: Ikeda
authors.forename: Masahiro
authors.initials: M
authors.lastname: Hata
authors.forename: Leonides
authors.initials: L
authors.lastname: Canuet
authors.forename: Kaoru
authors.initials: K
authors.lastname: Imajo
authors.forename: Mieko
authors.initials: M
authors.lastname: Tanaka
authors.forename: Haruyasu
authors.initials: H
authors.lastname: Matsuzaki
authors.forename: Toshimitsu
authors.initials: T
authors.lastname: Musha
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Takeda
mesh_terms: D000328:Adult; D001921:Brain / Q000473:pathology* / Q000503:physiopathology*; D001931:Brain Mapping / Q000379:methods; D004566:Electrodes; D004569:Electroencephalography / Q000379:methods*; D004827:Epilepsy / Q000175:diagnosis / Q000503:physiopathology*; D005625:Frontal Lobe / Q000503:physiopathology; D006801:Humans; D008297:Male; D012640:Seizures; D013997:Time Factors